The Greek capital Athens was rocked by an explosion in the small hours of Tuesday morning.
A bomb went off outside the offices of the Greek business federation, damaging the building but claiming no victims. A 30-minute warning was given to two newspapers.
“I heard a big bang and I was scared But I was prepared because the police had warned us. There was a bag down there, and they feared it was a bomb,” said one eye-witness.
Police suspect domestic terror groups to be behind the attack, the first since Prime Minister Alexis Tsipras became leader in January.
“A few meters away from the blast is a well-known Athens Hotel. The building was immediately evacuated because of the imminent threat,” says euronews’ Michalis Arampatzoglou.
Greece has a number of extreme right and left-wing groups who have used violence in the past in pursuit of their aims, either by attacking symbolic buildings, or assassinating public figures.